<template>
  <div>
    <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>

      <el-card>
<el-alert
    title="注意：只允许为第三级分类设置相关参数"
    type="warning"
    show-icon
    :closable="false">
  </el-alert>

 <el-row class="cat_opt">

   <el-col>
     <span>选择商品分类:  </span>
      <el-cascader
   expand-trigger="hover"
    v-model="selectedCateKeys"
    :options="catelist"
    :props="cateProps"
    @change="handleChange"
    ></el-cascader>
  </el-col>
  </el-row>

   <el-tabs v-model="activeName" @tab-click="handleTabClick">
    <el-tab-pane label="动态参数" name="many">

    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true" >添加参数</el-button>
      <!-- 动态参数表格 -->
      <el-table :data="manyTableData" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i">{{item}}</el-tag>
          </template>
        </el-table-column>

        <el-table-column type="index"></el-table-column>
        <el-table-column label="参数名称" prop="attr_name" ></el-table-column>
        <el-table-column label="操作"  >
         <template slot-scope="scope">
    <el-button type="primary" size="mini" icon="el-icon-edit" >编辑</el-button>
    <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)" >删除</el-button>

         </template>
        </el-table-column>
      </el-table>
    </el-tab-pane>
    <el-tab-pane label="静态属性" name="only">

    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
 <!-- 动态参数表格 -->
      <el-table :data="onlyTableData" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="参数名称" prop="attr_name" ></el-table-column>
        <el-table-column label="操作"  >
         <template slot-scope="scope">
    <el-button type="primary" size="mini" icon="el-icon-edit" >编辑</el-button>
    <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>

         </template>
        </el-table-column>
      </el-table>
    </el-tab-pane>

  </el-tabs>
      </el-card>
  <el-dialog
  :title="'添加'+titleText"
  :visible.sync="addDialogVisible"
  width="50%"
  @close="addDialogClosed"
  >
  <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" >
  <el-form-item :label="titleText" prop="attr_name">
    <el-input v-model="addForm.attr_name"></el-input>
  </el-form-item>
  </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      catelist: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedCateKeys: [],
      activeName: 'many',
      manyTableData: [],
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: '',
        attr_id: ''
      },
      addFormRules: {
        attr_name: [{
          required: true, message: '请输入参数名称', trigger: 'blur'
        }]

      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      console.log(res.data)
      this.catelist = res.data
    },
    handleChange () {
      this.getParamsData()
    },
    handleTabClick () {
      console.log(this.activeName)
      this.getParamsData()
    },
    async getParamsData () {
      console.log(this.selectedCateKeys)
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数失败')
      }
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals.split('')
      })
      console.log(res.data)

      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败')
        }
        this.$message.success('添加参数成功！')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    async removeParams (attr_id) {
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败！')
      }
      this.$message.success('删除参数成功！')
      this.getParamsData()
    }

  },
  computed: {
    isBtnDisabled () {
      if (this.selectedCateKeys.length === 0) {
        return true
      }
      return false
    },
    cateId () {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
  .cat_opt{
    margin: 15px 0;
  }
  .el-tag{
    margin: 10px;
  }
</style>
